Safety attachment for air-hose nozzles



w. H. ms. r SAFH'Y ATTACHMENI' FOR MR HOSE NOZZLES.

MI'LICAUOIl F ILED JULY 13. I918.

Patented Nov. 18, 1919.

Jwmmtoz WILLIAM H. PIT'I'S, OF MEDICINE LODGE, KANSAS.

SAFETY ATTACHMENT FOR AIR-HOSE NOZZLES.

Specification of Letters Patent.

Patented Nov. 18, 1919.

Application filed July 13, 1918. Serial No. 244,750.

7 '0 all whom it may concern:

Be it known that I, \VILLIAM H. Prrrs, a citizen of the United States, residing "at Medicine Lodge, in the county of Barber and State of Kansas, have invented certain new and useful Im )rovcments in Safet- Attaehments forAirose Nozzles, of whic the following is a specification.

This invention relates to improvements in safety attachments for the hose of air compressing pumps, and it is the principal object of the invention to provide a. novel of the character mentioned which can he set to permit escape of air at any desired pres sure, thus rendering the same applicable for use in connection with tires varying in size.

The improvements in the details and arrangement of parts will be apparent from an inspection of the accompanying drawings, when considered in connection with the specific description hereinafter contained and wherein a preferred embodiment of the invention is disclosed for the purpose of imparting a full understanding thereof.

In the drawings:

Figure 1 is aside elevation of the improved nozzle attachment, and

Fig. 2 is an enlarged vertical longitudinal section therethr'oug Referring now more specifically to 'the drawings, in connection with which like reference characters will designate corresponding parts throughout the several views, 1 re resents the nozzle in its entirety, the same eing formed with a corrugated nipple 2 adapted to receive one end of an air hose connected to a suitable form 01 air compressing pump, while the other end is enlarged and screw threaded to receive a cap having a plug 3 therein formed with a concentrically disposed air passage 4 for an obvious purpose. A partition 5 is formed in the nozzle 1 and extends throughout a portion of its length, thus affording-a by.-pass 6, one end of which communicates with the discharge end of the nozzle 1 while the ot or end communicates with an air esca e 0 enmg 7 formed in the upper side of t 1e i termediate portion of said nozzle. In this connection, it is to be noted that the inner portions of the nozzle 1 formed by the partition 5 is screw threaded and receives a complementally threaded sleeve 8 carryin a pm 9, which pin is engaged by a 001 spring 10 in said sleeve and adapted to pass at its lower end through the openin 4 in the plug 3 in position to'be engaged y the stem of the usual form of tire valve stem to permit the assage of air from the pressure pump into t is tire; the spring 10, obviously serving to automatically 'close the flow oi air.

A gage member is provided and includes a partially externally screw threaded sleeve 11 arranged on or formed integral with the upper portion of the nozzle 1 and over the air escape opening 7 and receives an internallythreaded cap 12, said cap having a bearing member or washer 13 arranged therein and engaged by one end of an expanslble coil spring 14, the other end of said spring engaging a valve element 15 adapted to be normal] seated over the air esca opening 7, which opening, as will be noted has an annular seat 16 arran The sleeve 11 is provided wit an air escape aperture 18. Graduations 17 may be and preferably gm arranged on the outer,surface of the'sleeve' 11 and, as will be understood, to enable auser of the device to properlyl adjust the gage to cause the openmg of t e valve Hint at redetermined point. In using the improv device, the same is of course attached to the discharge end of an air hose having connection with a suitable form of air compressing pump. The plug is then engage over the tire valve, the p1n 9 serving to unseat said valve and to permit the passage of air thereinto'from the pump hose. Should the cap 12 be adusted on the sleeve 11 to the point indicating seventy pounds understood that the va. ve 15will be permitted to move from its seatwhen seventy pounds pressure has been obtained in thetire, thus allowing all excessive pressure to esca. e from the nozzle by way of the openmg of the tire. In this way, it will be readily ressure, it will be;

and ,thereby preventing overinflation' d thereabout.

appreciated by persons skilled in the art and that I ing 'lia troubl 6 the same.

Manifestly, the construction shown is the capable of considerable modification and lficotion as as within the scope of the bin the spmt of such u my clean. I conskkr wt 10 my mvenuon.

A. nozzle devlc vided with an air inlet communica 15 adapted to be attac es caused b e Including a body proescape chamber g with the bed to a hose having an body and at one end having an inlet including a yieldable vide means for materially lessenvalve. seat at (he other end, a sleeve within zlity of fblowouts and smuiar nre the y excesslve alr pressure In body and spaced from the valve seat, a

bypass communicating at one end with the :e between the vah'cjmd slee e and at other end with the Inlet to the escape chamber, a valve yielclably supported within escape chamber and operating to yieldably close the inlet thereto, and a spring pressed valve enacting with the valve veal.

and

including a stem exLending therethrough. o

In testlmony whereof, I affix my signature hereto.

WILLIAM H. P-ITTS. 

